vulnerability / NVI-00018421 / Revision 1
Capsule TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability
GitHub lists this reviewed advisory for github.com/projectcapsule/capsule. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
github.com/projectcapsule/capsule
source listed< 0.13.0
# TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability ## Summary The Capsule Controller runs with cluster-admin privileges. Although the TenantResource RawItems processing logic forcibly sets the namespace, this is ineffective for cluster-scoped resources. Tenant administrators can leverage the Controller's elevated privileges to create cluster-scoped resources (such as ClusterRole and ValidatingWebhookConfiguration) that they cannot create directly, achieving cross-tenant privilege escalation and cluster-level attacks. --- ## Details ### Vulnerability Location File: `internal/controllers/resources/processor.go` Function: `HandleSection()` Lines: 247-285 ### Core Issues 1. **Excessive Controller Privileges**: The Controller's ServiceAccount is bound to the cluster-admin ClusterRole ```yaml # ClusterRoleBinding: capsule-manager-rolebinding roleRef: kind: ClusterRole name: cluster-admin ``` 2. **Missing Resource Scope Validation**: Although the code calls `obj.SetNamespace(ns.Name)`, this is ineffective for cluster-scoped resources (ClusterRole, ValidatingWebhookConfiguration, etc.), as the Kubernetes API ignores this field 3. **Mis
03 / Response
What to do next
- investigate
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04 / Limits
What this report cannot establish
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05 / Provenance
Sources you can inspect
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- GHSA-qjjm-7j9w-pw72 ↗
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- Revision 1 ·
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